334 



DISSECTION OF THE ABDOMEN. 



Portal 

 system of 

 veins. 



Coronary 

 vein. 



at the left end of the transverse fissure ; a branch to the Spigelian 

 lobe of the liver arises from this piece of the artery. 



Dissection. The veins forming the portal will now be exposed 

 by raising up the pancreas from the left, as may be required. 



FIG. 125. PORTAL VEIN AND TRIBUTARIES (HENLE). 



a. Trunk of the portal vein. e. Left gastro-epiplo'ic. 



b. Upper mesenteric. /. Pyloric (in this case of large 



c. Right gastro-epiplo'ic. size). 



d. Inferior mesenteric. g. Venae breves. 



The splenic vein is not indicated by a letter. 



PORTAL VEIN. The veins of the stomach and intestine, and of 

 the spleen and pancreas, pour their blood into the vena portae. 

 The two mesenteric veins and their branches have been referred to 

 (pp. 316 and 318) ; and the three following, with the trunk of the 

 portal vein, remain to be noticed. 



The coronary vein accompanies the artery of the same name along 

 the small curvature of the stomach, and bending downwards at the 

 cardia, passes to the lower end of the portal vein or the adjacent 

 part of the splenic vein. 



